/* * ProGuard -- shrinking, optimization, obfuscation, and preverification * of Java bytecode. * * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu) * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License * for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package proguard.classfile.attribute; import proguard.classfile.*; import proguard.classfile.attribute.visitor.*; /** * This Attribute represents a line number table attribute. * * @author Eric Lafortune */ public class LineNumberTableAttribute extends Attribute { public int u2lineNumberTableLength; public LineNumberInfo[] lineNumberTable; /** * Creates an uninitialized LineNumberTableAttribute. */ public LineNumberTableAttribute() { } /** * Returns the line number corresponding to the given byte code program * counter. */ public int getLineNumber(int pc) { for (int index = u2lineNumberTableLength-1 ; index >= 0 ; index--) { LineNumberInfo info = lineNumberTable[index]; if (pc >= info.u2startPC) { return info.u2lineNumber; } } return u2lineNumberTableLength > 0 ? lineNumberTable[0].u2lineNumber : 0; } // Implementations for Attribute. public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, AttributeVisitor attributeVisitor) { attributeVisitor.visitLineNumberTableAttribute(clazz, method, codeAttribute, this); } /** * Applies the given visitor to all line numbers. */ public void lineNumbersAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfoVisitor lineNumberInfoVisitor) { for (int index = 0; index < u2lineNumberTableLength; index++) { // We don't need double dispatching here, since there is only one // type of LineNumberInfo. lineNumberInfoVisitor.visitLineNumberInfo(clazz, method, codeAttribute, lineNumberTable[index]); } } }
